You can control and monitor which materials are used and how they flow from inventory to discrete jobs and repetitive schedules and from jobs and schedules to inventory.

When you create jobs and repetitive schedules that have bills of material, routings, or both, material requirements for the appropriate components are automatically created. These requirements (demands) are considered ’open’ until they are fulfilled.
The MRP planning process and available to promise calculations include open requirements as demand but do not formally allocate them to their parent jobs and repetitive schedules.

Open material requirements are satisfied when components are issued and backflushed. Material shortages occur when insufficient inventory exists to cover open requirements. The MRP planning process reports current and projected material shortages and develops a plan to satisfy those shortages.

Negative Requirements/By–Product Recovery
You can use negative material requirements to recover by–products or other reusable components. Negative requirements are supplied instead of consumed by jobs and schedules. For example, if you add negative material requirements to a
non–standard discrete job that is tracking the disassembly of a completed part, the job supplies component materials rather than consuming them. Negative requirements are considered supply by the MRP planning process.

You can define negative requirement usage quantities when you assign components to bills of material in Oracle Bills of Material. Negative requirements can be assigned to lot, serial number, and lot and serial number controlled items.

Available–to–Promise Materials
You can view available–to–promise (ATP) status of components as you define, simulate, and view discrete jobs and as you view repetitive schedules.

WIP Shortage Reporting
The Discrete Job Shortage and Repetitive Schedule Shortage Reports list shortages or open requirements for jobs and repetitive schedules based on requirement date. You can optionally include quantities in non–nettable subinventories in the on–hand quantities displayed on these reports. You can also use these report to view bulk and supplier component requirements.
The View Material Requirements window can be used to view the requirements for a component across jobs and schedules. You can view quantities required and issued for each component.

Material Control Process Diagram